Aeroplane-hangar door.



F. W. DOST.

AEROPLANE HANG/m nooR.

APPLICATION FILED AUG. I4, 19H. 1,250,992.v

Patented Deo. 25, 1917.

3 SHEETS-SHEET I.

ZIS

F. W. DOST.

AEROPLANE HANGAR DOOR.

APPLICATION FILED Aus.|4.1911.

Patented Dec. 25,1917.

3 SHEETS-SHEET 2.

F. w. nos. AEHOPLANE HANGAR oooa.

APPLICATION FILED AUG. I4, |917.

Patented Dec. 25,1917.

3 SHEETS-SHEET 3.

UNITED saarns PAT ernten.

FREDERICK W; DOST, VALLEQ'O, CALFOBNIA.

Enorme-Hansen noon..

Specincation otLetters latent.

.application :use august' 14, 1917. serial m. ieaias.

To all whom t may concern.'

Be it lrnown that I, FREDERICK W. Dos'r, a citizen of the United States," residing at Vallejo,.in the county of Contra Costa and State of California, have invented new and useful Improvements in Ae'roplane-Hanar Doors, of which the following is a spec' cation.

The present invention relates to improvements in doors for aeroplane hangars.

These doors are from 60 to 90 feet wide,

and may be from 40Y to 50 feet high, and areA therefore of great weight.- One object of the present invention is to provide means whereby they may be so counterweighted that one man can easily open and close them.

Furthermore, these doors being of great.

area are subjected to great pressure by winds. A further object therefore is to provide meansv whereby they may be suitably connected together and braced to prevent them from being disturbed by 'heavy winds.

In the accompanying drawings, Figure 1 is an inside view of the door in its closed -p'o- 'sition; Fig. 2 is a diagrammatic view showing the rollers and chains for operating the door; Fig. 3 is an end view of the door r1n its closed position; Fig. 4 is a vertlcal crosssectional view thereof in the same position;

Fig..5 is a broken horizontal sectional view on the line 5-5 of Fig. 4;' Fig. 6 is a similar view on the line 6 6 of Fig. 4; Fig. isa. vertical cross-section of the door` in its` open position; Fig. 8 is an enlarged broken crosssectional view of two portions of the door in its closed position; Fig. 9 is an enlarged broken inside view thereof; Fig. 10 is a broken perspective view of a slotted holding plate and a brace therein; Fig. 11 is a perspective view of a retainer for the door.

Referring to the drawings, 1 indicates door jambe, the upper ortions of which are connected to the ends o a horizontal truss 2, said door jambs being recessed at the top, as Shown at 3, in their outer edges to receive the ends of said truss. Upon the truss and the upper ends of said door jambs rest the flanges 4 of an I-beam 6, sald flanges extending 1n vertical planes and the central member extending in a horizontal plane. p 1n the lower portions of said iianges'are mounted the ends of horizontal shafts 7, best shown in Figs. 3 4, there being in the present instance eig t of `said shafts. Each shaft 7 rasanten nee. e5, 1ere,

supports three dan ed rollers 8, y9, 11. Over' the rollers 8 exten three to the` right and three to the left', six chains 12, 12, which are attached to the eyes .of eye-bolts 13 extending vertically through an. up er door 14 and are connected to common c ains 15, from which are suspended counterwei-ghts 16, which move vertically in grooves 1'( n the outer sides of the door jambe 1. 1n like manner six chains 18 are attached tc the eyes of the eye-bolts 2O extendi'n verticalily through a lower door 19 and, a' ter exten ing over the .rollers 9, three to the right andthree to the left, are `connected to common chains 21 which are attached to similar counterweights 22. Five chains 23 are attached to screwfeyes 24 screwed into the lower por-v tion of the frame of the lower door 19 and extend upwardly and around the rollers 11 to the right and are attached to a common chain 25 which extends around a windlass 26 suitably vsupported on the floor at the Iright hand side of the door, and which has a crank handle 27 with a ratchet y28 and a 'pawl 2 9 to hold the doors raised as high as may be required. The windlass 26 has deep anges 30, 31, to prevent the chains from working 01T as the doors are raised.

l The doors 14 and 19 are similar in form and extend each the fullwidth of the door-V way and inustbe so constructed as to with-4 stand wind pressure amounting to 25 or 30 i tons, and hence must be'heavily braced and properly connected to theirsupports to prevent them from being `destroyed in a high wind. Thus, each door is formed with a .rectangular frame 32 reinforced throughout its whole length by channel-shaped metal 33v suitable, diagonal braces 34 and retained in place against movement outward from the door by means of upper and lower brackets 43, 44, therebeing a pair of such brackets for each movable stop 4,0.

The eye-bolts 13, 20 extend through plates 48 on the top of the doors, 14, 19, respectively, each of said plates extending transversely outward beyond the upper edge of the door, and having a depending pin 49, which pins pass into holes in plates 51 attached to, and extending inwardly from, the lower edges of the truss 2 and the door 14 respectively, the object being to connect the upper door to the truss and the lower door to the upper door in their closed positions to maintain them in proper positions relative to each other and to oier their combined resistance to wind pressure.

In order to brace the doors when in their closed position, the lower door 19 is provided with three braces 52, which at their upper ends are formed with hooks 53 which engage screw eyes 54 screwed into the upper portion of the door 19. The lower ends of the hooks are formed with flattened and enlarged heads 56, which when the door is in a closed position, engage T-shaped slots 57 in plates 58 secured to the floor above recesses 59 therein. When the door is to be elevated, these heads are removed from the slots 57, and the braces 52 are swung from the position in which they extend obliquely in planes at right angles to the door 19, to positions in which they extend obliquely in a plane parallel with said door 19, and they are supported in said positions by their lower portions, immediately above the heads, being received in the bent p0rtions of screw hooks 6l screwed into the lower side of the rectangular frame 32 of the door at a proper distance from the respective uprights, as shown in dotted lines in Fig. l. A

In order to hold the lower door 19 in a proper position, U-shaped plates 62 are connected to the floor to receive its lower edge.

Since the movable stops 40 are pivotally supported on the rollers 41 back of their centers of gravity, they swing outward upon cables being shorter than the other and connected to the longer cable, so that, when the operator pulls down on the longer cable, both stops 40 will be moved out from beneath the door 19 and will allow it to descend by gravity.

In order-to prevent the wind from disturbing the doors when they are raised, the

door 19 is provided at the bottom with a plurality of outwardly extending brackets 69, having upturned ends 71 and each having a hole 72, said holes being adapted to receive the lower ends 7 3 of the eye-bolts 13 extending through the upper door 14, and the upturned ends 71 engaging the lower portion of the truss 2.

The bracket 69 not only serves to connect the two doors together when they are being raised, but also serves the purpose of lifting the upper door.

yWhile chains are referred to for the support of the doors, it will be evident to those skilled in the art that any suitable cables or ropes may be used in their place.

I claim: 1. Aeroplane hangar doors comprising a 4pair of door jambs, a truss connecting their tops, a pair of doors slidable in said jambs, a pair of movable jambs adapted to hold the lower door when raised, means to connect the two doors together when lowered, means to connect to the truss the upper door when lowered, a rigid brace detachably connecting to the iioor the upper edge of the lower doorwhen in its closed position, and manual means for raising the lower door, and a bracket carried by the lower door for raising the upper door.

2. Aeroplane hangar doors comprising a pair of door jambe, a truss connecting the tops of the jambs, a pair of doors each slidable-in said door jambs, 4means to connect the doors together when lowered, means to connect to the truss the upper door when lowered, counterbalancing means for the doors, means for raising the doors, and a bracket carried by the lower door and adapted to Connect the two doors together when raised and to secure the two doors to the truss.

3. Aeroplane hangar doors comprising a pair of door jambs, vertically slidable doors supported therein, counterbalancing means for said doors, manual means adjacent to one of the door jambs for raising and lowering the doors, and a pair of stops, pivoted at their lower ends, their upper ends being movable into positions beneath the lower edges of the doors to hold the doors in their raised position.

4. Aeroplane hangar doors comprising a pair of door jambs, vertically slidable doors supported therein, counter-balancing means for said doors, manual .means adjacent, to one of the door jambs for raising and lowering the doors, a pair of movable stops adapted to hold both doors raised, and manual means adjacent the first named means for removing the stops from beneath one of the doors to permit the doors to descend.

5. Aeroplane hangar doors comprising a pair of door jambs, a truss connecting the Leseea jambs, a pair of doors sldabe in said. two doens together and to the truss when jambs, means to connect them together When raised, means to support the two doors when lowered, means to connect to the truss the raised, .and manual means for removing the il@ upper door when lowered, coun'terbalance support from the doors when they ae to be 5 Weights for the doors, manual :means for lowered, l

'aislng the lower door, a bracket eaed by the ower door and adapted to connect the FBEDERCK W. DUST. 

